Thread: Car idle jump and water from exhaust pipe

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  1. #1 Car idle jump and water from exhaust pipe 
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    Can someone please help me. My car has water dripping from the exhaust pipe. The rpms bounce at idle and make my car jump and shake. It sounds like my exhaust is all clogged up or something. Thanks
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  2. #2 Re: Car idle jump and water from exhaust pipe 
    Moderator dsmuts's Avatar
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    Water from the exhaust is normal until the engine has ran for a while and burned all the condensation out of the pipes. Do you have any codes?
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  3. #3 Re: Car idle jump and water from exhaust pipe 
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    i just have an egr code because the egr was deleted. But the car started jumping before the egr was taken out
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  4. #4 Re: Car idle jump and water from exhaust pipe 
    Moderator dsmuts's Avatar
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    Have you ever tuned it up? Have you had it scanned to see if there was another code?
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  5. #5 Re: Car idle jump and water from exhaust pipe 
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    I scanned it today and i got a p0403 and p0405. one is the egr and the other is the egr sensor+ Reply to Thread
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  6. #6 Re: Car idle jump and water from exhaust pipe 
    GT Level Member ShadowSwept's Avatar
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    I'm dealing with the same thing right now. Unplug your MAF sensor and see if there's a difference.
    2001 Bonneville SLE - L36, Cone Filter, 200k miles
    2003 Grand Prix GT
    - L36, Short Ram Intake, HV3, Emissions Delete, ZZP 3" Downpipe, Overkill Tune, 200k miles

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  7. #7 Re: Car idle jump and water from exhaust pipe 
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    i took the sensor out and it still does the same thing. There's also some white smoke coming out the exhaust.
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  8. #8 Re: Car idle jump and water from exhaust pipe 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    white is coolant.

    Sounds like you got more than 1 problem.

    SMGPFC Member #1
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  9. #9 Re: Car idle jump and water from exhaust pipe 
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    it used to be a lot of white smoke but then i changed the lim gasket so now theres barely any. The little bit i saw might just have been leftover or something.
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  10. #10 Re: Car idle jump and water from exhaust pipe 
    Killa Bee Scottydoggs's Avatar
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    what is your car, make engine year?

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  11. #11 Re: Car idle jump and water from exhaust pipe 
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    99 grand prix gtp
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  12. #12 Re: Car idle jump and water from exhaust pipe 
    Killa Bee Scottydoggs's Avatar
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    did you just finish the lim job? if so are you sure the plug wires are on right.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  13. #13 Re: Car idle jump and water from exhaust pipe 
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    yes im sure. The car was jumping before the lim job.
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  14. #14 Re: Car idle jump and water from exhaust pipe 
    Killa Bee Scottydoggs's Avatar
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    check engine light on?

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  15. #15 Re: Car idle jump and water from exhaust pipe 
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    yea its on but just a p0403 and p0405 because of an egr delete. The car was jumping before the egr delete too
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  16. #16 Re: Car idle jump and water from exhaust pipe 
    GrandPrix Junkie
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    You took the MAF out of the TB, or just disconnected the harness to it?

    Check for vacuum leaks. Look under the snout of the S/C at the T and see if it's cracked. You can use carb or brake cleaner to spray around all the vac. connections to see if you hear a difference in the motor while it is running. If you find a spot that makes the motor change tone then that is a vac leak.

    As stated, water from the exhaust is normal. Now, the white smoke may or may not be normal. There is a chance that it's normal condensation in the air if you noticed this while it was cool outside. If it was 95* out and you see white smoke then you are burning coolant.
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  17. #17 Re: Car idle jump and water from exhaust pipe 
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    i just disconnected the harness. I replaced the vacuum lines so I don't think its a vacuum leak.
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  18. #18 Re: Car idle jump and water from exhaust pipe 
    Moderator dsmuts's Avatar
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    The hesitation could be from the disconnected maf unless you just recently disconnected it for troubleshooting purposes.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  19. #19 Re: Car idle jump and water from exhaust pipe 
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    I disconnected it for troubleshooting purposes
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